I used to flip cars to help pay for college. Much better return on investment but also requires more up front investment, tooling and knowledge.

I've thought about flipping bikes but the profit margins doesn't interest me enough to turn a hobby into a job. While I'm not rich enough that $50-$100 is chump change I'm also not so destitue that I need the hassle of CL buyers either. I usually just give away a bike to friends and family or just enough to cover my costs.

There are those instances where you can make good money off a nice used bike but those are rare and even rarer still off CL.